The Heart and Healthcare: Science Videos

This series explains how your heart, blood vessels, and kidneys work together to control blood pressure. You will meet the heart, learn about arteries and veins, and see how a stethoscope measures blood pressure. You will also learn how hormones from the kidneys and brain raise or lower blood pressure. High blood pressure is very common, so this knowledge can help protect your health. No background is needed for the early videos.

Note: All Khan Academy content is available for free at www.khanacademy.org